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Coherent Frequency-Modulated Continuous Wave Ladar Using a Distributed Feedback Laser Array.

紀錄類型:	書目-語言資料,手稿 : Monograph/item
正題名/作者:	Coherent Frequency-Modulated Continuous Wave Ladar Using a Distributed Feedback Laser Array./
作者:	DiLazaro, Thomas.
面頁冊數:	1 online resource (177 pages)
附註:	Source: Dissertation Abstracts International, Volume: 79-10(E), Section: B.
Contained By:	Dissertation Abstracts International79-10B(E).
標題:	Electrical engineering. -
電子資源:	click for full text (PQDT)
ISBN:	9780438007765

Coherent Frequency-Modulated Continuous Wave Ladar Using a Distributed Feedback Laser Array.
DiLazaro, Thomas.

Coherent Frequency-Modulated Continuous Wave Ladar Using a Distributed Feedback Laser Array. - 1 online resource (177 pages)

Source: Dissertation Abstracts International, Volume: 79-10(E), Section: B.

Thesis (Ph.D.)--The Catholic University of America, 2018.

Includes bibliographical references

Optical frequency-modulated continuous-wave (FMCW) reflectometry is a ranging technique that allows for high-resolution distance measurements over long ranges. Similarly, swept-source optical coherence tomography (SS-OCT) provides high-resolution depth imaging over typically shorter distances and higher scan speeds. In this dissertation, a novel, low-cost, low-bandwidth ranging and imaging system is presented that provides the high axial resolution normally associated with SS-OCT over meters of depth. The imaging system combines 12 distributed feedback laser (DFB) elements from a single butterfly module to provide an axial resolution of 27 microns. Active sweep linearization is used, greatly reducing the signal processing overhead. A laser phase noise model is derived to provide insight into the measurement accuracy. Various sub-surface, OCT-style tomograms of semi-transparent objects are shown, as well as 3-D maps of various objects over depths ranging from sub-millimeter to several meters. Such imaging capability would make long-distance, high-resolution surface interrogation possible in a low-cost, compact package.

Electronic reproduction.
Ann Arbor, Mich. :
ProQuest,
2018

Mode of access: World Wide Web

ISBN: 9780438007765Subjects--Topical Terms:

596380
Electrical engineering.
Index Terms--Genre/Form:

554714
Electronic books.

Coherent Frequency-Modulated Continuous Wave Ladar Using a Distributed Feedback Laser Array.
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500 $a Source: Dissertation Abstracts International, Volume: 79-10(E), Section: B.
500 $a Includes supplementary digital materials.
500 $a Adviser: George Nehmetallah.
502 $a Thesis (Ph.D.)--The Catholic University of America, 2018.
504 $a Includes bibliographical references
520 $a Optical frequency-modulated continuous-wave (FMCW) reflectometry is a ranging technique that allows for high-resolution distance measurements over long ranges. Similarly, swept-source optical coherence tomography (SS-OCT) provides high-resolution depth imaging over typically shorter distances and higher scan speeds. In this dissertation, a novel, low-cost, low-bandwidth ranging and imaging system is presented that provides the high axial resolution normally associated with SS-OCT over meters of depth. The imaging system combines 12 distributed feedback laser (DFB) elements from a single butterfly module to provide an axial resolution of 27 microns. Active sweep linearization is used, greatly reducing the signal processing overhead. A laser phase noise model is derived to provide insight into the measurement accuracy. Various sub-surface, OCT-style tomograms of semi-transparent objects are shown, as well as 3-D maps of various objects over depths ranging from sub-millimeter to several meters. Such imaging capability would make long-distance, high-resolution surface interrogation possible in a low-cost, compact package.
533 $a Electronic reproduction. $b Ann Arbor, Mich. : $c ProQuest, $d 2018
538 $a Mode of access: World Wide Web
650 4 $a Electrical engineering. $3 596380
650 4 $a Optics. $3 595336
655 7 $a Electronic books. $2 local $3 554714
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